CN116632509A - Rotary paraboloid type foldable antenna structure - Google Patents

Abstract

The application discloses a rotary parabolic foldable antenna structure, wherein a basic unit is designed based on a rigid thick plate paper cutting theory and comprises three single-degree-of-freedom foldable arrays, an elastic driving hinge and spokes. The spring driving hinge is arranged at the joint of the single-degree-of-freedom folding and unfolding array, and the automatic unfolding of the folding and unfolding array can be realized through spring driving. According to the application, the surface topography of the folding array is processed in a material cutting and adding mode, so that the array has higher profile precision, and the stopping of the unfolding motion is realized through the interference between the plate surfaces and the foldable arrays. The folding type folding device can be folded into a smaller volume in a non-working state, is convenient to transport, enables the foldable array to be unfolded to an expected working position through the driving force of the spring in the working state, and has the advantages of being simple in structure, large in folding ratio, small in degree of freedom, stable in unfolding, high in molded surface precision and the like.

Description

Rotary paraboloid type foldable antenna structure

Technical Field

The application relates to the technical field of space foldable and unfoldable mechanisms, in particular to a rotary paraboloid type foldable and unfoldable antenna structure.

Background

A space-deployable structure is a structure that enables a primary structure, a secondary structure, or a component of a spacecraft to change from an initial position or configuration to a final position or configuration and maintain that state. It is a structural field which is gradually developed from simple to complex along with the development of spacecrafts. With the rapid development of the aerospace field, a large aerospace structure with an unfolding characteristic is produced, the unfolding structure is in a folded and folded state in the launching process, the unfolding structure is fixedly installed inside a carrier rocket, after being launched into a track, the unfolding structure is gradually unfolded by a ground command center control structure according to requirements, and the operation state is kept after the unfolding structure is locked, so that a large space structure is formed. The parabolic surface-expandable surface antenna is an important application of a space-expandable structure in aerospace engineering, is valued by many researchers, is an important component part of a satellite structure, and is an important physical platform for directly executing satellite functions.

At present, researchers at home and abroad have carried out many researches on the expandable structure of the solid surface, and various types of expandable structures of the solid surface are designed. The fixed surface unfolding mechanism is generally formed by a rigid thick plate to form a working molded surface, a hinge is used as a rotary joint between rigid panels, the rigid panel is folded and folded when not in operation, the rigid panel is slowly unfolded by driving the hinge or a motor when in operation, and a support structure such as a truss and the like is used. The existing solid surface foldable structure such as a sunflower-shaped foldable antenna, a Cassegrain foldable antenna and the like has the characteristics of high profile precision and stable structure, however, the foldable ratio is small, and the current and future use requirements are difficult to meet. Therefore, designing a deployable surface structure with little degrees of freedom, simple structure, large fold-over ratio, and high profile accuracy is a major concern for researchers.

Disclosure of Invention

The application aims to solve the problems in the prior art, and provides a rotary parabolic foldable antenna structure with the advantages of large folding ratio, high profile precision and high stability, which aims to solve the problems that the current space foldable structure is small in folding ratio, low in profile precision or incapable of being automatically unfolded.

The technical scheme adopted for realizing the purpose of the application is as follows:

a rotary paraboloid type foldable antenna structure comprises a plurality of identical single-degree-of-freedom foldable arrays and a spoke, wherein the spoke is positioned in the middle of the foldable antenna structure, and the plurality of single-degree-of-freedom foldable arrays are distributed at certain angles around the center line of the spoke; the single-degree-of-freedom folding and unfolding array is formed by alternately arranging a plurality of basic folding and unfolding units, and each basic folding and unfolding unit is formed by connecting rigid thick plates through a first spring driving hinge; each single-degree-of-freedom folding array is connected with the spoke through a second spring driving hinge; when the foldable antenna structure is unfolded to a working state, the side edges of the single-degree-of-freedom foldable array correspond to each other; the surface morphology of the rigid thick plate is subjected to material adding and cutting treatment, and a dihedral angle or a sector angle is adjusted to make a curved surface curvature, so that the rigid thick plate has a preset molded surface to meet the molded surface and self-locking requirements.

The structures of the plurality of single-degree-of-freedom folding and unfolding arrays are identical.

The single-degree-of-freedom folding and unfolding array consists of a first basic folding and unfolding unit, a second basic folding and unfolding unit and a third basic folding and unfolding unit; the first basic folding and unfolding units are symmetrically arranged next to the spokes and are sequentially arranged; the second basic folding and unfolding units are arranged above the first basic folding and unfolding units; the third basic folding and unfolding unit is positioned between the first basic folding and unfolding unit and the second basic folding and unfolding unit, and the first basic folding and unfolding unit and the second basic folding and unfolding unit are arranged in a staggered manner and share the rigid thick plate.

When the single-degree-of-freedom folding and unfolding arrays are unfolded to be a plane and the number of columns of the rigid thick plate is determined, the number of the arrays is calculated by adjusting the size of the fan-shaped angle, so that a plurality of the single-degree-of-freedom folding and unfolding arrays are unfolded to form a closed loop, and the curvature of a curved surface is formulated.

When the dihedral angle of the single-degree-of-freedom folding array is determined, the curvature of the curved surface is formulated by adjusting the dihedral angle.

The front trapezoid bottom edge/the back trapezoid bottom edge of the middle lower plate of the basic folding and unfolding unit of the single-degree-of-freedom folding and unfolding array are connected with the front side edge of the spoke to form a first assembling configuration and a second assembling configuration respectively.

The front trapezoid bottom edge of the middle lower plate of the basic folding and unfolding unit is connected with the front side edge of the spoke to form a first assembly configuration; the first assembly configuration is in a shape of a paraboloid of revolution when being unfolded to a working state when the single-degree-of-freedom folded array synchronously moves, and a complete target paraboloid of revolution is cut out, and a track moves in a single degree of freedom when being folded.

The front trapezoid bottom edge of the middle lower plate of the basic folding and unfolding unit is connected with the back side edge of the spoke to form a second assembly configuration; the second assembly configuration presents a parabolic shape when unfolded when the single-degree-of-freedom folding array moves synchronously, and has two different states after the folding is completed, and the two states can be mutually converted.

The profile of the rigid thick plate is matched with the target paraboloid by removing materials, and the rigid thick plate is contacted with the adjacent rigid thick plate when being unfolded to the working position by adding materials, so that the single-degree-of-freedom folding and unfolding array can be kept at the working position under the combined action of the contact force between the spring driving hinge and the rigid thick plate, and the profile of the rigid thick plate is matched with the target paraboloid, so that the rotary paraboloid type foldable structure with large folding and unfolding ratio, high profile precision and high stability is formed.

The section form of the single-degree-of-freedom deployable array rises in a gradient form in a step slope, and when the section inclination angle is matched with the parabolic inclination angle, the profile of the rigid thick plate is matched with a target parabolic surface by removing and adding materials to the rigid thick plate.

According to the rotary parabolic type foldable antenna structure, the single-degree-of-freedom foldable array is designed based on the thick plate paper-cut folding mode, the foldable structure is unfolded under the driving force of the spring-driven hinge after the profile of the rigid thick plate is adjusted through the connection of the single-degree-of-freedom foldable array and the spokes, and the foldable structure is unfolded to the working position under the combined action of the driving force and the contact force, so that the specific parabolic type profile requirement during working is realized.

Drawings

Fig. 1 is an axial schematic view of a folded rotary parabolic antenna according to an embodiment of the present application after being unfolded.

Fig. 2 is a first schematic diagram of a paraboloid-of-revolution foldable antenna structure according to an embodiment of the present application (showing an arrangement of three single-degree-of-freedom foldable arrays) in a top view after being unfolded.

Fig. 3 is a second schematic diagram of a unfolded top view of a parabola-type foldable antenna structure according to an embodiment of the present application (showing five basic folded unit arrangements of each single-degree-of-freedom foldable array).

FIG. 4 is a schematic diagram of a single degree of freedom folded array according to an embodiment of the present application.

Fig. 5 is a schematic view of a spring-actuated hinge according to an embodiment of the present application.

FIG. 6 is a schematic view of the angle and thickness parameters of six planks of a basic folding and unfolding unit according to an embodiment of the present application.

Fig. 7 is a schematic front view of a basic folding unit with a spring-driven hinge according to an embodiment of the present application.

Fig. 8 is a schematic back view of a basic folding unit with a spring-actuated hinge according to an embodiment of the present application.

FIG. 9 is a schematic diagram of a split cut of a single degree of freedom folded array according to an embodiment of the present application.

Fig. 10 is a schematic front view of the target profile of a paraboloid-of-revolution foldable antenna structure according to an embodiment of the present application.

Fig. 11 is a reverse schematic view of the target profile of a paraboloid-of-revolution foldable antenna structure in accordance with an embodiment of the present application.

Fig. 12 is a schematic view of processing the target profile of the rotating parabolic type foldable antenna structure according to the embodiment of the present application.

Fig. 13 is a schematic view of the assembled configuration of two different mounting forms of the paraboloid-of-revolution foldable antenna structure according to an embodiment of the present application.

Fig. 14 is a schematic diagram showing an unfolding process of the rotating parabolic type foldable antenna structure according to the embodiment of the present application.

Reference numerals:

1 single degree of freedom folding and unfolding array and 2 spokes;

a first single-degree-of-freedom scalable array I, a second single-degree-of-freedom scalable array II, and a third single-degree-of-freedom scalable array III;

1-1 of a first basic folding and unfolding unit, 1-2 of a second basic folding and unfolding unit, 1-3 of a third basic folding and unfolding unit, 1-4 of a fourth basic folding and unfolding unit and 1-5 of a basic folding and unfolding unit;

2-1 first plate, 2-2 second plate, 2-3 third plate, 2-4 fourth plate, 2-5 fifth plate, 2-6 sixth plate, 2-7 seventh plate, 2-8 eighth plate, 2-9 ninth plate, 2-10 tenth plate, 2-11 eleventh plate, 2-12 twelfth plate, 2-13 thirteenth plate, 2-14 fourteenth plate, 2-15 fifteenth plate, 2-16 sixteenth plate, 2-17 seventeenth plate, 2-18 eighteenth plate, 2-19 nineteenth plate, 2-20 twentieth plate, 2-20 twenty-fourth plate;

the left hinge of the 3-1 spring hinge, the right hinge of the 3-2 spring hinge, the 3-3 spring, the pin shaft and the 3-4 fixing bolt hole;

4-1 first assembled configuration, 4-2 second assembled configuration.

Detailed Description

The application is described in further detail below with reference to the drawings and the specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The application relates to a rotary paraboloid type foldable antenna structure which consists of three same single-degree-of-freedom foldable units and a spoke, wherein an ideal working profile is obtained by adding or removing a rigid thick plate material, and the whole structure is driven to be unfolded by an elastic driving hinge.

Referring to fig. 1, a rotary paraboloid type foldable antenna structure is designed based on paper-cut theory and thickness plate of plane paper-cut, and is formed by connecting a spring-driven hinge and a single-degree-of-freedom foldable array unit 1, concretely, referring to fig. 2, the rotary paraboloid type foldable antenna structure is formed by three identical first single-degree-of-freedom foldable arrays I, second single-degree-of-freedom foldable arrays II, third single-degree-of-freedom foldable arrays III and a spoke 2, each single-degree-of-freedom foldable array is formed by twenty rigid thick plates and twenty eight elastic-driven hinges (16 on the front side and 12 on the back side), and each single-degree-of-freedom foldable array is connected with the spoke by two additional spring-driven hinges, such as the single-degree-of-freedom foldable arrays I, II and III are respectively connected with the spoke by two spring-driven hinges. The surface morphology of the rigid thick plate is processed in a material adding and cutting mode, so that the rigid thick plate has a specific preset molded surface, and the movement stopping in an unfolding state is realized by utilizing the interference between the plate surfaces of the rigid thick plate, so that the molded surface and the self-locking requirement are met.

In the embodiment of the application, for the single-degree-of-freedom folding and unfolding array and the spoke, the 3D printing technology can be used for making the geometric model, and the processing material can be PLA.

The whole rotary paraboloid type foldable antenna structure is characterized in that spokes are positioned in the middle of the foldable structure from the overlook angle, the first single-degree-of-freedom foldable array I, the second single-degree-of-freedom foldable array II and the third single-degree-of-freedom foldable array III are distributed around the central line of the spokes at intervals of 120 degrees, as shown in fig. 2, each single-degree-of-freedom foldable array is divided and cut at intervals of 120 degrees according to the central line of the spokes, as shown in fig. 9, the broken line parts on two sides are removed, and one single-degree-of-freedom foldable array is formed.

In the embodiment of the application, the spring driving hinge consists of a left hinge 3-1, a right hinge 3-2, a driving spring, a connecting pin shaft 3-3 and a bolt 3-4, wherein the left hinge is connected with the right hinge through the connecting pin shaft, the driving spring is nested on the connecting pin shaft, the tail end of a spring wire of the driving spring is respectively contacted with the left hinge and the right hinge to provide driving force, the spring driving hinge is positioned at a rigid thick plate joint, and the left hinge and the right hinge are connected with a rigid plate to form a rotary kinematic pair with a driving effect, as shown in figure 5.

In the embodiment of the application, the spring driving hinge is made of metal and is arranged at the crease position of the single-degree-of-freedom deployable array, and the spring driving hinge has the advantages of high strength and light weight.

As an embodiment, the three single-degree-of-freedom folding arrays are identical in structure, each folding array is composed of a plurality of basic folding units, and as an embodiment, one single-degree-of-freedom folding array is constructed by five basic folding units, and after construction, a part of the rigid thick plate needs to be cut so as to ensure that no interference occurs after folding.

Referring to fig. 3, in which a first basic folding unit 1-1 and a second basic folding unit 1-2 are symmetrically arranged, a fourth basic folding unit 1-4 and a fifth basic folding unit 1-5 are symmetrically arranged above the first basic folding unit 1-1 and the second basic folding unit 1-2, a third basic folding unit 1-3 is located between the first basic folding unit 1-1, the second basic folding unit 1-2, the fourth basic folding unit 1-4 and the fifth basic folding unit 1-5, and the second basic folding unit 1-2 is located on the right side of the first basic folding unit 1-1 with two common plates with the first basic folding unit 1-1, as shown in fig. 3; the fourth basic folding and unfolding unit 1-4 is arranged above the first basic folding and unfolding unit 1-1 and has no shared plate with the first basic folding and unfolding unit 1-1; the fifth basic folding and unfolding unit 1-5 is arranged above the second basic folding and unfolding unit 1-2, and has no shared plate with the second basic folding and unfolding unit 1-2; the third basic folding and unfolding unit 1-3 is positioned in the middle of the first basic folding and unfolding unit 1-1, the second basic folding and unfolding unit 1-2, the fourth basic folding and unfolding unit 1-4 and the fifth basic folding and unfolding unit 1-5, and six sharing boards are arranged between the third basic folding and unfolding unit 1-3 and the first basic folding and unfolding unit 1-1, the second basic folding and unfolding unit 1-2, the fourth basic folding and unfolding unit 1-4 and the fifth basic folding and unfolding unit 1-5.

Wherein, referring to fig. 4, each basic folding and unfolding unit is formed by connecting six boards, for example, the component boards of the first basic folding and unfolding unit 1-1 are a third board 2-3, a fourth board 2-4, a seventh board 2-7, an eighth board 2-8, an eleventh board 2-11, a twelfth board 2-12, and for example, the component boards of the second basic folding and unfolding unit 1-2 are an eleventh board 2-11, a twelfth board 2-12, a fifteenth board 2-15, a sixteenth board 2-16, a nineteenth board 2-19, and a twentieth board 2-20; the first basic folding unit 1-1 and the second basic folding unit 1-2 share the eleventh board 2-11 and the twelfth board 2-12, as shown in fig. 6, and the structures of the other three basic folding units are not described again, as shown in fig. 4.

Referring to fig. 4, taking a basic folding unit on the left side as an example, two middle plates are arranged in a vertically connected mode in the middle of the basic folding unit, two outer side plates are respectively arranged on two sides of the middle plates, and the two outer side plates are mutually connected to form the basic folding unit; the peak folds of each basic folding unit are arranged at the joints of the left first plate (third plate 2-3) and the middle first plate (seventh plate 2-7), the joints of the left second plate (fourth plate 2-4) and the middle second plate (eighth plate 2-8), the joints of the middle first plate (seventh plate 2-7) and the right first plate (eleventh plate 2-11), the joints of the middle second plate (eighth plate 2-8) and the right second plate (twelfth plate 2-12) of the thick plate units, and the valley folds are arranged at the joints of the left first plate (third plate 2-3) and the left second plate (fourth plate 2-4), the joints of the right first plate (eleventh plate 2-11) and the joints of the second plate (twelfth plate 2-12) of the thick plate units.

As shown in fig. 6, for any basic folding unit, the basic folding unit can be folded normally under the constraint condition that the folded paper of the thick plate is satisfied, the basic folding unit is formed by sharing a crease with two single-vertex four-crease marks, and the angle relationship should be satisfied: α1+α2=pi, α3+α4=pi, α5+α7=pi, α6+α8=pi, the plate thickness relationship should satisfy a1=a3=a5=a1, a2=a4=a6=a2,

among the above parameters, a1 to a6 are plate thicknesses, α1 to α8 are fan angles, the basic folding unit 1-1 is taken as an example to explain the meaning of the parameters, a1 is the thickness of the fourth plate 2-4, a2 is the thickness of the eighth plate 2-8, a3 is the thickness of the twelfth plate 2-12, a4 is the thickness of the third plate 2-3, a5 is the thickness of the seventh plate 2-7, a6 is the thickness of the eleventh plate 2-11, α1 is the angle between the top edge and the right oblique side in the front trapezoid of the fourth plate 2-4, α2 is the angle between the top edge and the left oblique side in the front trapezoid of the eighth plate 2-8, α3 is the angle between the bottom edge and the left oblique side in the front trapezoid of the seventh plate 2-7, α4 is the angle between the bottom edge and the right oblique side in the front trapezoid of the third plate 2-3, α5 is the angle between the top edge and the right oblique side in the front trapezoid of the eighth plate 2-8, α6 is the angle between the top edge and the front oblique side in the front trapezoid of the twelfth plate 2-12, and α7 is the angle between the bottom edge and the front edge in the front trapezoid of the seventh plate 2-8.

For each basic folding and unfolding unit, 6 rotary joints are shared between adjacent thick plates, 1 or 2 spring driving hinges are installed on each rotary joint, as shown in fig. 7 and 8, 6 rotary joints are shared on each joint, 8 spring driving hinges are shared on each joint, two spring driving hinges are respectively used on each joint on the back of each basic folding and unfolding unit, the installation positions of the spring driving hinges are provided with the connection part of the right oblique edge of the left first plate and the left oblique edge of the middle first plate, the connection part of the right oblique edge of the left second plate and the left oblique edge of the middle second plate, the connection part of the left oblique edge of the right first plate and the right oblique edge of the middle first plate, and the connection part of the left oblique edge of the right second plate and the right oblique edge of the middle second plate, and the installation positions of the spring driving hinges are provided with the connection part of the lower flat edge of the left first plate and the upper flat edge of the left second plate and the right first plate and the upper flat edge of the right first plate.

According to the foldable antenna structure, when the foldable antenna structure is unfolded to a working state, the side edges of the three single-degree-of-freedom foldable arrays correspond to each other. For any single-degree-of-freedom folding array, only one driving force is needed to realize folding motion of the array, for example, motion input is transferred from a first single-degree-of-freedom basic folding unit 1-1 to a second single-degree-of-freedom basic folding unit 1-2, then transferred from the second single-degree-of-freedom basic folding unit 1-2 to a third single-degree-of-freedom basic folding unit 1-3, then transferred from the third single-degree-of-freedom basic folding unit 1-3 to a fourth single-degree-of-freedom basic folding unit 1-4, and then transferred from the fourth single-degree-of-freedom basic folding unit 1-4 to a fifth single-degree-of-freedom basic folding unit 1-5. The spring drives the hinge to provide driving force for the single free folding array to unfold to a working position, and the rest positions provide auxiliary unfolding force to help the single free folding array to realize folding motion.

The foldable antenna structure of the application is a foldable antenna structure formed by a plurality of identical single-degree-of-freedom foldable arrays, and in order to form a rotating paraboloid, the single-degree-of-freedom foldable arrays are formed by a plurality of basic foldable units, wherein the mathematical relationship can be described as follows:

wherein m is the number of the single-degree-of-freedom folding arrays,represents the dihedral angle, m, of adjacent rigid slabs _R The number of thick plate layers in the direction around the spoke center in the single-degree-of-freedom extensible array is selected.

The rotating paraboloid type foldable antenna structure of the embodiment of the application can realize the design of the same paraboloid in two ways, wherein the first is to achieve the design requirement by adjusting the fan-shaped angles alpha 1-alpha 8, and the second is to adjust the dihedral angleTo meet the design requirement. The target paraboloid can be obtained by adding or removing the material to the rigid thick plate of the rotary paraboloid type foldable antenna structure, as shown in fig. 10 and 11.

In the embodiment of the application, the curvature of the curved surface can be formulated by adjusting the dihedral angle. Since the single-degree-of-freedom expandable array section is in a gradient-like form and rises in the step slope, when the section inclination angle theta is similar to the parabolic inclination angle, the superfluous material on the surface can be removed by a cutting method, so that a target parabolic curved surface with an expandable structure is formed, and as shown in fig. 12, the front surface of the uniform thick plate is subjected to material removal, and the back surface is not treated. The antenna structure is shown in cross-section along the center line in fig. 12, wherein the thin solid and dashed lines on the left and right sides, except for the center spoke, represent the highest or lowest position that can be reached by all the uniform thick plates in the structure around the center dash-dot line, and a continuous spatial region is located between the highest and lowest positions, in which the desired paraboloid can be cut. The thick solid line in fig. 12 is interposed in the above-described space region, and is a parabolic shape after the material is removed.

In the embodiment of the application, the single degree of freedom folding and unfolding array and the central spoke have two connection modes, wherein the first is that the front trapezoid bottom edge of the middle second plate (namely the eighth plate 2-8 shown in fig. 4 and 6) of the basic unit 1 is connected with the front side line of the spoke, and the second is that the back trapezoid bottom edge of the middle second plate (namely the eighth plate 2-8 shown in fig. 4 and 6) of the basic unit 1 is connected with the front side line of the spoke; the two different fitting modes form two different configurations, a first fitting configuration 4-1 and a second fitting configuration 4-2, respectively.

Under the condition of synchronous movement of the single-degree-of-freedom folding and unfolding array, in a first assembly configuration, the folding and unfolding array presents a parabolic shape when unfolded to a working state, and the track presents single-degree-of-freedom movement when folded, as shown in a left side diagram of fig. 13; in the second assembly configuration, the second assembly configuration is unfolded to form a parabolic shape, and after the second assembly configuration is folded, two different states of the second assembly configuration in fig. 13 are obtained, and the two states can be mutually converted, so that the right side view of fig. 13 is shown. The first assembly configuration is identical to the single-degree-of-freedom folding array of the second assembly configuration, the difference is that the folding array is connected with the center spoke in different modes, in the second assembly configuration, after the single-degree-of-freedom folding array is folded, the single-degree-of-freedom folding array can be integrally folded around a hinge connected with the spoke, and two folded states of the second assembly configuration can be regarded as two states before and after folding. The two aforementioned assemblies differ in that they cut the paraboloid, the first assembly being capable of cutting a relatively complete target paraboloid of revolution and the second assembly being incapable of cutting a complete paraboloid of revolution. The folded and unfolded states of the two assembled forms are shown in fig. 13.

The specific working process of the rotary parabolic foldable antenna structure of the embodiment of the application is as follows:

the spoke bottom surface of the embodiment of the application is placed on a horizontal plane, so that the single-degree-of-freedom folding and unfolding array is in a folding state, after the intervention of a manual pressing mechanism is removed, the spoke bottom surface is automatically unfolded under the drive of a built-in spring driving hinge, and after the spoke bottom surface is unfolded to an expected working position, the thick plate structure stops further unfolding due to interference collision; is maintained in the desired working profile position by the spring force and the contact force of the plank face. After opening, the whole will present a parabolic surface of a specific busbar, and the working position of the parabolic foldable structure is shown in fig. 14, and fig. 14 shows the opening process in a folded state of the first assembly configuration and the second assembly configuration. After deployment is completed, the array may be gathered by a manual or special retrieval device, as shown in FIG. 13.

The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.

Claims (10)

1. The rotary paraboloid type foldable antenna structure is characterized by comprising a plurality of identical single-degree-of-freedom foldable arrays and a spoke, wherein the spoke is positioned in the middle of the foldable antenna structure, and the plurality of single-degree-of-freedom foldable arrays are distributed at certain angles around the center line of the spoke; the single-degree-of-freedom folding and unfolding array is formed by alternately arranging a plurality of basic folding and unfolding units, and each basic folding and unfolding unit is formed by connecting rigid thick plates through a first spring driving hinge; each single-degree-of-freedom folding array is connected with the spoke through a second spring driving hinge; when the foldable antenna structure is unfolded to a working state, the side edges of the single-degree-of-freedom foldable array correspond to each other; the surface morphology of the rigid thick plate is subjected to material adding and cutting treatment, and a dihedral angle or a sector angle is adjusted to make a curved surface curvature, so that the rigid thick plate has a preset molded surface to meet the molded surface and self-locking requirements.

2. The rotating parabolic dish type foldable antenna structure according to claim 1, wherein the structures of the plurality of single degree of freedom foldable arrays are identical.

3. The rotating parabolic foldable antenna structure according to claim 1, wherein the single degree of freedom foldable array is composed of a first basic foldable unit, a second basic foldable unit, and a third basic foldable unit; the first basic folding and unfolding units are symmetrically arranged next to the spokes and are sequentially arranged; the second basic folding and unfolding units are arranged above the first basic folding and unfolding units; the third basic folding and unfolding unit is positioned between the first basic folding and unfolding unit and the second basic folding and unfolding unit, and the first basic folding and unfolding unit and the second basic folding and unfolding unit are arranged in a staggered manner and share the rigid thick plate.

4. The structure of claim 1, wherein when the single degree of freedom folded array is unfolded into a plane and the number of columns of the rigid thick plates is determined, the number of arrays is calculated by adjusting the size of the fan-shaped angle, so that a plurality of the single degree of freedom folded arrays are unfolded to form a closed loop, thereby making a curvature of a curved surface.

5. The rotating parabolic type foldable antenna structure according to claim 1, wherein when the dihedral angle of the single degree of freedom foldable array is determined, the curvature of the curved surface is formulated by adjusting the magnitude of the dihedral angle.

6. The rotating parabolic dish type foldable antenna structure according to claim 1, wherein a front trapezoid base/a rear trapezoid base of a middle lower plate of the basic folding unit of the single degree of freedom folding array is connected with a front side line of a spoke to form a first assembling configuration and a second assembling configuration respectively.

7. The rotating parabolic dish-type foldable antenna structure according to claim 6, wherein the front trapezoid base of the intermediate lower plate of the basic folding unit is connected to the front side line of the spoke to form a first assembly configuration; the first assembly configuration is in a shape of a paraboloid of revolution when being unfolded to a working state when the single-degree-of-freedom folded array synchronously moves, and a complete target paraboloid of revolution is cut out, and a track moves in a single degree of freedom when being folded.

8. The rotating parabolic dish-type foldable antenna structure according to claim 6, wherein the front trapezoid base of the intermediate lower plate of the basic folding unit is connected to the back side line of the spoke to form a second assembly configuration; the second assembly configuration presents a parabolic shape when unfolded when the single-degree-of-freedom folding array moves synchronously, and has two different states after the folding is completed, and the two states can be mutually converted.

9. The structure of claim 1, wherein the profile of the rigid plank is matched with the target paraboloid by removing material, and the rigid plank is contacted with the adjacent rigid plank when being unfolded to the working position by adding material, so that the single-degree-of-freedom folding array can be kept in the working position under the combined action of the contact force between the spring driving hinge and the rigid plank, and the profile of the rigid plank is matched with the target paraboloid, so that the rotating paraboloid type folding structure with large folding ratio, high profile precision and high stability is formed.

10. The structure of claim 1, wherein the single degree of freedom deployable array has a cross-sectional shape that rises in a gradient fashion in a stepped slope, and when the cross-sectional tilt matches the parabolic tilt, the profile of the rigid slab is matched to the target parabola by removing and adding material to the rigid slab.